Update Windows cpack options.
Update Windows cpack options.

These options are for creating a Desktop shortcut, but it is disabled
for now by setting CPACK_NSIS_MODIFY_PATH to OFF because the features
doesn't actually work unless you add VeloView to the user path.

Kitware/VeloView,OpenChemistry/tomviz-superbuild,Kitware/VeloView,Kitware/VeloView,mathstuf/tomviz-superbuild,frizaro/Veloview,frizaro/Veloview,mathturtle/tomviz-superbuild,cjh1/tomviz-superbuild,cjh1/tomviz-superbuild,frizaro/Veloview,OpenChemistry/tomviz-superbuild,mathturtle/tomviz-superbuild,Kitware/VeloView,mathstuf/tomviz-superbuild,frizaro/Veloview,Kitware/VeloView